Most partners will also ask to see you tap 'Go to customer' to mark the order as collected. When this happens you should show staff your phone - this helps the partner make sure they're giving you the right order, and helps them confirm that you're intending to deliver the order. If you choose not to show your rider app to a partner when collecting an order, the partner can choose not to hand you the order, and ask for another rider.
If you choose not to show your rider app to a partner when collecting an order, the partner may decide not to hand you the order, and ask for another rider instead.